While Valve continue working towards the public SteamOS 3 release for more devices, and we've seen them note work towards that in the initial SteamOS 3.7 Preview, they continue rolling out more bug fixes for the Steam Deck.
https://www.gamingonlinux.com/2025/03/steamos-3-7-2-preview-gets-a-fix-for-the-steam-deck-oled/